File



c. E. BERT-ELS Nov. s, 1928.

FILE Filed Oct. 8, 1927 5 age/leis.

Patented Nov. 6, 1928.

UNITED STATES PATENT "OFFICE.

CHARLES E. BERTELS, OF LONG BEACH, CALIFORNIA, ASSIGNOR OF ONE-HALF To 7 JOHN P. BENNING, OF TRUCKSVILLE, PENNSYLVANIA.

FILE.

Application filed October 8, 1927. Serial No. 224,980.

This invention relates to files and has for an important object thereof the provision of a flexible file of such construction that it may be very conveniently employed for treating round surfaces of different diameters.

A more specific object of the invention is to produce a file formed in a plurality of relatively short sections which are pivotally connected wit-h one another in such manner that adjacent sections may be relatively positioned to contact curved surfaces of different diameters.

The invention further resides in the meth- 0d of constructing and connecting the sections.

These and other objects I attain by the construction shown in the accompanying drawing, wherein for the purpose of illustration is shown a preferred embodiment of my invention and wherein Figure 1 is a side elevation of a file constructed in accordance with my invention;

Figure 2 is a fragmentary plan View there- Figure 3 is a section on the line 3-3 of Figure 2:

Figure 4.- is a fragmentary plan view showing a sli htly modified form of file sect-ion.

Referring now more particularly to the drawing, the numeral 10 generally designates handles to which are linked at 11 the ends of a file 12 formed in a plurality of sections 13; The sections 13 may be formed in a number of diiferent ways of which two are illustrated. In Figures 1 and 2, the file sections each comprise a plurality of leaves 14:, the in ner faces of which are provided with file or shallow saw teeth. The blades are arranged in spaced relation to one another and are mounted at their ends upon pins 15,vwhich form the pivots between the sections, the blades of each section being stagger-ed with relation to the adjacent sections and interdigitated therewith. The endmost pins 15 serve to connect the ends of the file band 12 to the links 11, the opposite ends of these links being connected to the handle by pins 16, In Figure 4, the file sections are each in the form of a block 1'7, one surface of which is treated to form a file face 18 and the ends of which are provided with ears 19 adapted to interdigitate with the ears of adjacent sections and be pivoted thereto by pins 20.-

It will be obvious that by either of the confication without materially departing from the spirit of the invention, I do not limit myself to such specific structure except as hereinafter claimed.

I claim I A file comprising a pair of handles and a flexible band connecting the same, said flexible band being composed of sections each comprising a plurality of fiat leaves having file teeth upon at least one face thereof, said leaves being spaced from one another transversely of the sections, the leaves of one section being interdigitated with the leaves of the adjacent sections and pins extended through the interdigitated portions of the leaves to pivot-ally connect the same and maintain the leaves in assembled relation.

In testimony whereof I hereunto afiix my signature.

CHARLES E. BERTELS. 

